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Volume 191, 2016

Gold nanotriangles decorated with superparamagnetic iron oxide nanoparticles: a compositional and microstructural study

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Abstract

The combination of iron oxide and gold in a single nanoparticle results in both magnetic and plasmonic properties that can stimulate novel applications in bio-sensing, medical imaging, or therapeutics. Microwave assisted heating allows the fabrication of multi-component, multi-functional nanostructures by promoting selective heating at desired sites. Recently, we reported a microwave-assisted polyol route yielding gold nanotriangles decorated with iron oxide nanoparticles. Here, we present an in-depth microstructural and compositional characterization of the system using scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS). A method to remove the iron oxide nanoparticles from the gold nanocrystals and some insights on crystal nucleation and growth mechanisms are also provided.

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Article information


Submitted
29 Feb 2016
Accepted
11 Mar 2016
First published
11 Mar 2016

Faraday Discuss., 2016,191, 215-227
Article type
Paper

Gold nanotriangles decorated with superparamagnetic iron oxide nanoparticles: a compositional and microstructural study

J. A. Hachtel, S. Yu, A. R. Lupini, S. T. Pantelides, M. Gich, A. Laromaine and A. Roig, Faraday Discuss., 2016, 191, 215 DOI: 10.1039/C6FD00028B

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